Concrete-mixing machine.



No. 773,375; a PATENTBD 0012525, 1904. R. H. L. COOPER. CONORETB'MIXINGMACHINE.

- APPLICATION FILED FEB. 4, 1904. NO MODEL BBHETITB-BHEET 1.

W V @Q/MA-M .8

No. 773,375. I PATENTED OCT. 25, 1904.

, R. H. L. COOPER.

CONCRETE MIXING MACHINE.

APPLICATION FILED FER-4, 1904.

N0 MODEL. 3 SHEETS-SHEET 2.

No. 773,375. PATENTED OCT. 25, 1904.

R.IH. L. COOPER. CONCRETE MIXING MACHINE.

7 APPLICATION FILED IEB. 4, 1904. NO MODEL. 3 SHEETS-SHEET 3.

UNiTEn STATES Patented October 25, 1904.

ATENT- FFIICE.

CONCRETE-MIXING MACHINE.

SPECIFICATION forming part of Letters Patent No. 773,375, dated October25, 1904.

Application filed February 4, 1904. Serial No. 191,919. (No model.)

To all whom, 22!; NMLZ/ concern:

Be it known that I, RICHARD H. L. COOPER, a citizen of the UnitedStates, residing in St. Louis, State of Missouri, have invented certainnew and useful Improvements in Ooncrete-Mixing Machines, of which thefollowing is a specification containing a full, clear,

and exact description, reference being had to I the accompanyingdrawings, forming a part hereof.

My invention relates to concrete-mixing machines, my object being toconstruct a machine in which concrete and similar material may be mixedby centripetal force and discharged by centrifugal force; and myimproved concrete-mixing machine comprises a suitable frame, headsrotatably mounted in said frame, a series of involute mixer-bladesconnecting said heads. there being feed-openings through said heads,hoppers discharging to said feed-openings, means of regulating the flowfrom said hoppers, means of rotating said heads in one direction to mixthe concrete or the like by gravity, and means of rotating said heads inthe opposite direction to discharge the concrete by centrifugal force.

In the drawings, Figure 1 is a sectional ele vation substantially on theline 1 l of Fig. 2 and looking in the direction indicated by the arrow.Fig. 2 is a side elevation as seen looking in the direction indicated bythe arrow 2 in Fig. 1. Fig. 3 is a cross-sectional detail through themixer-blades and taken on the line 3 3 of Fig. 4. Fig. 4 is alongitudinal section of the mixer heads and blades and taken on the line4 4 of Fig. 3. Fig. 5 is a view analogous to Fig. 3 and showing themodified construction, parts being broken away to economize space. Fig.6 is a view looking in the direction indicated by the arrow 6 in Fig. 5,parts being shown in section to better illustrate the construction.

Referring to the drawings in detail, the posts 10 are mounted verticallyupon the sills 11, the upper ends of said posts being connected bybraces 12, and a floor 13 rests on said braces. Bearing-rollers 14 and15 are mounted upon the sills l1, and similar bearing-rollers 16 and 17are mounted upon the posts 10.

The mixer-heads comprise the vertical circular plates 18 and 19, thefunnel-shaped walls 20 and 21, extending inwardly from said plates andhaving the flanges 22 and 23, re-

spectively, projecting outwardly from their inner edges parallel Withthe plates 19, and the ring-shaped plates 24 and 25 are attached to saidflanges 22 and 23, respectively, there being feed-openings 26 and 27through the plates 18 and 19 and enlarged feed-openings 28 and 29through the plates 24 and 25, respectively. The series of involutemixerblades 30 connect the inner faces of the plates 24 and 25, therebyconnecting said mixerblades, thus forming the involute concrete channels31, leadingfrom the peripheries of the plates 24 and 25 to points nearthe openings 28 and 29. The obstruction-plates 32 are fastened to theinner edges of the blades 30 to obstruct the channels 31, so as to breakup the concrete as it passes through said channels. Bearing-surfaces 33and 34 are formed upon the peripheries of the plates 18 and 19, therebeing flanges 35 upon each side of the bearing-surface 33 and flanges 36upon each side of the bearing-surface 34, said bearingsurfaces restingupon the rollers 14, 15, 16, and 17 and said rollers operating betweensaid flanges.

Tooth-segments are attached to the funnelshaped Wall 21 to form asprocket-wheel 37, and a sprocket-chain 38 connects the sprocketwheel 37to the driving-sprocket 39, mounted upon the shaft 40, and the belt 41connects the pulley 42 upon said shaft to the source of power, saidsource of power being preferably a counter-shaft carrying pulleys andclutches,whereby the'motion may be reversed at Will, so as to operatethe mixer first in one direction and then in the other.

A hopper 43 is mounted in position to discharge into the feed-opening 27said hopper being held in position by braces 44, attached to one of thesills 11, the discharging end of said hopper forming a close joint withthe plate 19, and rollers 45, carried by said hopper, engage said plate19 to prevent friction between the hopper and the plate. A valveframe 46is mounted at the inner side of the hopper, and a valve 47, controlledby the handle 18, slides from the frame 4:6 to regulate thedischarge-opening 19 of the hopper, thus regulating the flow of concretefrom the hopper to the mixer.

The hopper may be filled through the opening 50 in the floor 13, thehandle 18 operated to raise the valve 47, and the concrete will passthrough the opening 27 and through the opening 29 to the mixer-blades30, and when said mixer-blades are operated in the direction indicatedby the arrow 51 in Fig. 3 the concrete Will pass through the channels 31by gravity and strike the obstruction-plates 32 and be thrown to thecenter of the mixer,and after said concrete has been sufiicientlyagitated the direction of rotation is reversed, as indicated by thearrow 52 in Fig. 3, and then the concrete will pass outwardly throughthe channels 31 and drop upon the floor or ground or into any suitablereceptacle under the mixer, the speed of discharge depending, of course,upon the speed of rotation.

.ln the modification shown in Figs. 5 and 6 the plates 53 close theouter ends of the chan nels 31, and inclined guide-plates 5 1 areinserted to lead the concrete outwardly through the openings 55 ineither of the ring-shaped plates 24 or 25, thus discharging the concreteto one side of the mixer instead of discharging from the periphery.

If desired, a hopper may be mounted in operative relation to each of theplates 18 and 19, and the machine may thus be fed from both sides, and,if desired, a different material may be fed from each hopper, saidmaterial being mixed in the machine.

I claim-- 1. In a concrete-mixing machine: suitable sills; posts mountedvertically upon the sills in the form of a square; braces connecting theupper ends of the posts; a floor resting upon said braces and having afeed-opening; bearing-rollers mounted upon the sills and upon the posts,so as to support the ends of the mixer; mixer-heads comprising verticalcircular plates 18 and 19, the funnel-shaped walls 20 and 21, theflanges 22 and 23 projecting outwardly from the inner edges of thefunnel-shaped walls 20 and 21, and the ringshaped plates 24 and 25attached to the flanges 22 and 23 respectively, there beingfeed-openings through the plates 18 and 19, and enlarged feed-openingsthrough the plates 2 1 and 25; the series of involute mixer-bladesconnecting the inner faces of the plates 21 and 25; there beingbearing-surfaces 33 and 34 upon the peripheries of the plates 18 and 19to engage said rollers; and flanges 35 and 36 upon the opposite sides ofsaid bearingsurfaces to hold the mixer in place upon the rollers;substantially as specified.

2. In a concrete-mixing machine: rollers arranged to form bearings;vertical circular plates 18 and 19; the bearing-surfaces 33 and 3 1 uponthe peripheries of said plates and engaging said rollers; flangesholding said bearing-surfaces in position upon said rollers; thefunnehshaped walls 20 and 21 extending inwardly from the plates 18 and19; the ring-shaped plates 2a and 25 attached to the inner ends of saidfunnel, there being feedopenings through said plates 18 and 19, andlarger feed-openings through the plates 24 and 25; and the series ofinvolute mixerblades 30 connecting the plates 24 and 25; substantiallyas specified.

3. In a concrete-mixing machine: suitable heads; a series of involutemixer-blades connecting the heads; means of mounting and rotating theheads, there being a feed-opening through one of said heads; the hopper43 mounted in position to discharge into said feed-opening; and rollers45 carried by said hopper to engage the head of the rotating mixer;substantially as specified.

In testimony w hereof l have signed my name to this specification inpresence of two subscribing witnesses.

RICHARD H. L. COOPER.

\Vitnesses:

ALFRED EIOKS, M. G. IRION.

